Title

Capacitance based mass metering for cryogenic fluids

Authors

Authors

M. A. Nurge; R. Youngquist;D. Walters

Comments

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Abbreviated Journal Title

Cryogenics

Keywords

hydrogen; nitrogen; oxygen; dielectric properties; instrumentation; Thermodynamics; Physics, Applied

Abstract

This paper describes a method for measuring the mass of cryogenic fluids in on-board rocket propellant tanks or ground storage tanks. Linear approximations to the Clausius-Mossotti relationship serve as the foundation for a capacitance based mass sensor, regardless of fluid density stratification or tank shape. Sensor design considerations are presented along with the experimental results for a capacitance based mass gage tested in liquid nitrogen. This test data is shown to be consistent with theory resulting in a demonstrated mass measurement accuracy of +/-0.75% and a deviation from linearity of less than +/-0.30% of full scale mass. Theoretical accuracies are also shown to be +/-0.73% for hydrogen and +/-1.39% for oxygen for a select range of pressures and temperatures. Published by Elsevier Ltd.

Journal Title

Cryogenics

Volume

43

Issue/Number

9

Publication Date

1-1-2003

Document Type

Article

Language

English

First Page

501

Last Page

506

WOS Identifier

WOS:000184980300002

ISSN

0011-2275

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